Based on the mole ratio of the reaction, the mass of aluminum oxide that is produced from the reaction between 5 g of aluminum and 9g of oxygen is 9.39 g.
What mass of aluminum oxide can be formed from the reaction between aluminum and oxygen?The mass of aluminum oxide that can be formed from the reaction between aluminum and oxygen is determined from the limiting reactant and the mole ratio of the reaction.
The mole ratio of the reaction is as given in the equation of the reaction below:
2 Al (s) + 3 O₂ (g) ----> Al₂O₃ (s)
The mole ratio of Al to O = 2 : 3
Moles of Al present = 5/27
Moles of Al present = 0.185 moles
Moles of O present = 9/32
Moles of Al present = 0.281 moles
Al is the limiting reactant
Mole ratio of Al to Al₂O₃ = 2 : 1
Mass of Al₂O₃ produced = 0.185/2 * 101.56
Mass of Al₂O₃ produced = 9.39 g
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Which element is similar to antimony
Answer:
N, P, As, Bi, Mc
Explanation:
Similar chemical properties are usually found within the same column of the periodic table.
Antimony is Sb, which is in column 15.
Therefore all the elements in column 15, including N, P, As, Bi, Mc, should have similar chemical properties
please help me with it
Explanation:
I can't see the questions!!
A single molecule of water contains 1 oxygen atom and 2 hydrogen atoms
- 1 mole of H2O
How many molecules and how many atoms?
When chromium changes from an oxidation state of +3 to that of +6, the Cr3+ must:
A. gain 6 electrons B. lose 6 electrons
C. lose 3 electrons D. gain 3 electrons
When chromium changes from an oxidation state of +3 to that of +6, the Cr3+ must: lose 3 electrons.
So option C is correct.
What is an oxidation state?
The oxidation state or oxidation number, is the hypothetical charge of an atom if all of its bonds to different atoms were fully ionic which describes the degree of oxidation of an atom in a chemical compound. In any concept, the oxidation state may be positive, negative or zero.
When chromium changes from an oxidation state of +3 to + 6 it loses 3 electrons during the process. For example oxidation state of elemental atoms such as sodium, magnesium, iron is zero.
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Which description of the atoms resulted from this experiment
Option D, A small, positive nucleus is mostly empty.
Rutherford's atomic version is the version which defined the atom as a tiny, dense, undoubtedly charged middle referred to as a nucleus, wherein almost all of the mass is focused, round which the light, bad constituents, referred to as electrons, flow into at a few distance, just like planets revolving across the Sun.
What is the Rutherford gold-foil test, A piece of gold foil became hit with alpha debris, that have a fantastic charge. Most alpha debris went proper through. This confirmed that the gold atoms had been normally empty space.
The 3 fundamental observations of the test had been: Most of the distance within the atom is empty. All the fantastic costs are focused in a completely small vicinity in the atom, referred to as the nucleus. The nucleus's length may be very small as compared to the scale of the atom.
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Which of these ground state ions has unpaired electrons
Mg 2+
P2-
Sc2+
S2-
V5+
The ground state ion that has unpaired electrons is Sc²⁺ ion; option C is correct.
What is ground state ion?The ground state ion is the state in which all its electrons are in the lowest energy orbitals possible. You can get positive ions by removing electrons until you reach a noble gas configuration.
Ground state ion configurations are the foundation for understanding molecular bonding, properties, and structures. From the electrons in an atom to the differing orbitals and hybridization, the ground state ion configuration throws light on many different atomic properties.
For example, the electronic configuration of Sc²⁺ is 1s²2s²2p⁶3s²3p⁶ 3d¹ 4s.
In conclusion, understanding electronic configuration leads to an understanding of the periodic table.
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How many particles of sodium hydroxide Will neutralize 1.6 moles pt sulfuric acid?
H2SO4 + 2 NaOH = Na2SO4 + 2 H2O
3.2 moles of NaOH will neutralize 1.6 moles of H₂SO₄
What is the mole ratio?A molar ratio is a ratio between the amounts (moles) of any two compounds that participate in a chemical reaction. It is the conversion factor between compounds in a chemical reaction and is derived from the compound's coefficients of the balanced equation. Therefore, molar ratios are used to convert the amounts of compounds in a chemical reaction.
For the given reaction:
H₂SO₄ + 2NaOH = Na₂SO₄ + 2H₂O
The above reaction is a balanced reaction and indicates that two molecules of NaOH are involved with one molecule of H₂SO₄ for neutralization. So, this gives the mole fraction of 1: 2.
Now, considering the mole ratio of H₂SO₄ to NaOH, which is 1: 2. For every mole of the sulphuric acid the reaction requires twice the moles of the sodium hydroxide.
Since the given moles of H₂SO₄ = 1.6 moles
Moles of NaOH = 2 × 1.6
= 3.2 moles
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what is manforce ????
Answer:
Explanation:
Manforce is a type of prescription in medical purposes used to treat erectile dysfunction for men. It usually comes in 100 mg tablets with price varying from 250- 350. It increases the blood flow within the person to maintain a erection in men.
Hope it helps!
A gas leak was detected in an apartment building and the resulting gas was analyzed. A sample was found to contain 1.54 grams of nitrogen and 0.277 grams of hydrogen. Determine the empirical formula for the leaked gas.
The empirical formula for the leaked gas, given it contains 1.54 grams of nitrogen and 0.277 grams of hydrogen is NH₃
How do I determine the empirical formula?The empirical formula for the leaked gas can be obtained as illustrated below:
Nitrogen (N) = 1.54 gramsHydrogen (H) = 0.277 gramsEmpirical formula =?Divide by their molar mass
N = 1.54/ 14 = 0.11
H = 0.277 / 1 = 0.277
Divide by the smallest
N = 0.11 / 0.11 = 1
H = 0.277 / 0.11 = 3
Thus, from the above calculation, we can conclude that the empirical formula of the gas is NH₃
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What is the pH of 3.9 M potassium fluoride?
Round your answer to 2 decimal places.
The pH of the 3.9M of pottasium fluoride is 0.591.
How to calculate pH?pH of a solution can be described as the figure expressing the acidity or alkalinity of a solution on a logarithmic scale on which 7 is neutral, lower values are more acid and higher values more alkaline.
The pH of a solution can be calculated by using the following expression:
pH = -log {H}
Where;
H = hydrogen ion concentrationAccording to this question, a 3.9 M potassium fluoride is given. The pH can be calculated as follows:
pH = - log {3.9}
pH = -0.591
Therefore, the pH of the solution is 0.591
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Hi, can someone please help me find out what the compound names are for each of these.. thank you!! kindly appreciate it (:
The organic nomenclature of the condensed structural compound is 1. Octane.
1. Octane
2. But - 2- ene
3. ethylene
4. Penatne
5. But - 2 - yne
6. hept 1 - yne
7. Hexx-2 - ene
8. But -1 - yne
In chemical nomenclature, the IUPAC nomenclature of organic chemistry is a method of naming natural chemical compounds as recommended by using the global Union of natural and applied Chemistry. it is posted inside the Nomenclature of Organic Chemistry.
The name of the organic compound is written out with the substituents in alphabetical order observed via the bottom call (derived from the wide variety of carbons in the discern chain). Commas are used among numbers and dashes are used between letters and numbers. There are no spaces inside the call.
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Compounds are made up of two or more blank that are blank
The chemical substances that are made up of two or more elements are known as compounds.
Compounds are the chemical substances that are made up of two or more elements which bonded to each other with fixed ratio. When elements combine with each other some of there individual properties are lost and some new properties are observed in the newly formed compounds.
Compounds can be differentiated into two types:
Molecular compounds are the compounds formed by elements which are bonded with each other by covalent bonds. Examples: H₂OIonic compounds or salts are the compounds formed by elements which are bonded with each other by ionic bonds. Example: NaClLearn more about compounds from the link given below.
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Calculate the molarity of 25.7 g of MgS in 919 mL of solution.
What do you mean by molarity?
Molarity-Molarity is a term that is used to show concentration of the solution . It is different from molality as it is expressed in mol per L , whereas molality is expressed in mol per kg.
Given:
Mass of Mgs is 25.7 g.Volume of the solution is 919 ml.The mole of Mgs is calculated as follows :
Mole= Mass / Molar Mass
= 25.7g/56.38 g/mol
= 0.455 mol.
The molarity of Mgs solution is calculated as follows :-
Molarity =Mole/Volume ( L )
=0.455mol/919ml* 1000ml/1L
=0.495M
Thus, the molarity of the solution is 0.495 M.
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In the lac operon how do multiple proteins form from the same mRNA? due to RNA splicing due to high
due to high functioning spliceosome due to multiple start and stop codons
due to presence of operator sequences
In the Lac operon, multiple proteins form from the same mRNA due to RNA splicing.
What is an operon?An operon is a cluster of genes that are transcribed from the same promoter to give a single messenger RNA (mRNA) molecule that contains multiple coding sequences that are used to make multiple proteins.
Such an mRNA molecule is called a polycistronic mRNA.
An example of an operon is the Lac operon which encodes the genes used to produce the various enzymes required for the metabolism of lactose.
Three of the enzymes in the lac operon are grouped together and are known as lacZ, lacY, and lacA.
Alternative splicing of the mRNA produces the different proteins in operons.
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a beam of electrons,neutrons and protons can be separated by passing them through an electric field.
Which direction does each particle follow?
Answer:
the protons go in the direction of C, the electrons go in the direction of A and neutrons go the direction of B.
Explanation:
this is because electrons get attracted to positively charged objects and protons get attracted to negatively charged objects and neutrons have no attraction towards any charge.
If 18.0 grams of water were actually produced, what is the percent yield of the reaction between 4 g of hydrogen gas and 1.5 mol of oxygen gas?
The percent yield of the water is 33.3%.
What is the percent yield?We know that the reaction that takes place between hydrogen and oxygen to give water is; [tex]2H_{2} (g) + O_{2} (g) ----- > 2H_{2}O(g)[/tex]. We now need to find the number of moles of hydrogen = 4 g/2 g/mol = 2 moles
Now;
If 2 moles of hydrogen reacts with 1 moles of oxygen
We can see that oxygen is the limiting reactant in this case.
1 mole of oxygen produces 2 moles of water
1.5 moles of oxygen produces 1.5 * 2/1
= 3 moles of water
Then the theoretical yield of water = 3 moles * 18 g/mol = 54 g
Percent yield = Actual yield / theoretical yield * 100/1
= 18/54 * 100/1
= 33.3%
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A typical bath tub has a volume of 42 gallons what is this volume in liters
The volume of 42 gallons in liters is 158.99 liters.
What is a bathtub?
It is a big and open container that is normally filled with water and used to bathe the body.
What is liter?
This is a unit used in measuring volume. It is not a standard unit of measurement. A liter is equivalent in volume to a millistere. the symbol is ( L).
1 gallon = 3.7854 liters
Therefore 42 gallons in liters will be:
42 *3.7854= 158.99 liters
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Name one thing that we use in everyday life that uses either a magnetic field or an electric field.
A common thing in everyday life that uses the magnetic field or an electric field is the transformer.
What is a magnetic field?The term magnetic field is the region that is around a magnet where there is a the influence of a magnetic. Also, the region around a charge where the influence of the charge can be felt is called the electric field.
Most of the devices that we have at home do have a transformer such as a radio set and a television set. The transformer that is in this appliance causes the regulation of voltage in the appliance.
The transformer works on the principle of the magnetic field and the electric field.
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Which of the atoms listed below has the largest radius?
A) AI
B) P
C) Si
D) Na
E) Mg
According to the given statement Na of the atoms listed below has the largest radius.
What is an atom?An atom is made up of a core nucleus and one or even more electrons with negative charges that orbit it. The positively charged, comparatively hefty protons and neutrons that make it up the nucleus may be present. The fundamental building components of matter are atoms.
How are atoms made?Atoms are made up of a nucleus in the center that is surrounded by protons, neutrons, and electron. Uranium is divided into smaller atoms during the fission process, creating new atoms. The creation or atoms in enormous numbers can be seen in the Big Bang and Supernova phenomena.
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Help.
I think the answer is C.
Atoms, like people, desire______?
A - Alpha Decay
B - Beta Decay
C - Stability
D - Half-Life
Answer:
I agree, It would either me stabillity or half life.
Explanation:
How many total moles of ions are released when the following sample dissolves completely in water?
9.44 g of CuSO4 · 5H2O: mol
The total moles of ions produced when dissolving 9.44 g of CuSO₄.5H₂O completely in water is 0.0756.
What is a mole?A mole is described as a scientific unit for the measurement of a large number of quantities of ions, atoms, molecules, or other particular particles.
The number of entities present in one mole is equal to 6.023 × 10 ²³ is known as Avogadro’s number.
Given, the mass of CuSO₄.5H₂O sample = 9.44 g
The mass of 1 mole of CuSO₄· 5H₂O = 250 g/mol
Number of moles of CuSO₄· 5H₂O = 9.44/250 = 0.0378 mol
The dissociation of CuSO₄· 5H₂O when dissolved in water as:
[tex]CuSO_4.5H_2O \longrightarrow Cu^{2+} (aq) + SO_4^{2+} (aq) + 5H_2O (l)[/tex]
The number of Cu²⁺ ions of 0.0378 mol of CuSO₄· 5H₂O = 0.0378
The number of SO₄²⁻ ions of 0.0378 mol of CuSO₄· 5H₂O = 0.0378
Total moles of ions in the given sample= 0.0378 + 0.0378 = 0.0756 mol
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Just answer 11 and i will mark brainlest
A compound is formed by the combination of two or more different atoms. The white dot and black dot in the image are two different elements which combines together to form the compound AB.
What are compounds?Atoms are the basic units of every substances. Atoms combines to form molecules and molecules combines to form compounds. Thus compounds are chemical substances formed by the combination of different atoms.
For instance two oxygen atoms combines to form O₂ molecule similarly H₂, N₂ etc. can be formed from their respective atoms. When atoms of two different elements combines together they form compounds such as H₂O CO₂ etc.
These compounds can be formed through a specific type of chemical bonding such as ionic bonding, covalent bonding etc. The bond type depends on the nature of bonding atoms.
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classification of Sulfur Dioxide
Sulfur Dioxide, (SO2), is an inorganic compound, a heavy colorless poisonous gas.
Sulfur dioxide has a pungent, irritating odor, familiar as the smell of a just-struck match. It is produced in huge quantities in an intermediate setup. Occurring in nature in volcanic gases and in solution in the waters of some warm springs, sulfur dioxide usually is prepared industrially by the burning in air or oxygen of sulfur or such compounds of sulfur as iron pyrite or copper pyrite.
In the atmosphere, it can combine with water vapor to form sulfuric acid, a major component of acid rain. In the laboratory the gas may be prepared by reducing sulfuric acid (H2SO4) to sulfurous acid (H2SO3), which decomposes into water and sulfur dioxide, or by treating sulfites (salts of sulfurous acid) with strong acids, such as hydrochloric acid, again forming sulfurous acid.
Sulfur dioxide can be liquefied under moderate pressures at room temperatures; the liquid freezes at −73° C (−99.4° F) and boils at −10° C (14° F) under atmospheric pressure. Although its chief uses are in the preparation of sulfuric acid, sulfur trioxide, and sulfites, sulfur dioxide also is used as a disinfectant, a refrigerant, a bleach, and a food preservative, especially in dried fruits.
Molecular Formula: SO2
Molecular Weight: 64.07
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You have a sample containing 4.5 g of an unknown gas. Based on the volume, temperature, and pressure of the sample, there are 0.14 moles of gas present. What is the molar mass of this unknown gas?
A sample containing 4.5 g of an unknown gas. Based on the volume, temperature, and pressure of the sample, there are 0.14 moles of gas present. the molar mass of this unknown gas is
given that :
the mass of unknown gas = 4.5 g
number of moles of unknown gas = 0.14 mol
the number of moles is given as :
number of moles = mass / molar mass
molar mass of unknown gas = mass / moles
= 4.5 / 0.14
= 32.14 g/mol
Thus, A sample containing 4.5 g of an unknown gas. Based on the volume, temperature, and pressure of the sample, there are 0.14 moles of gas present. the molar mass of this unknown gas is
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Identify 2 ways you can change gravitational on an on an object ?
In an investigation of the decomposition of water, a student compared the amount
of oxygen in one test tube to the amount of hydrogen in the other test tube. Which
of the following statements is correct about the comparison?
A. There is twice as much oxygen as hydrogen.
B. There is an equal amount of oxygen and hydrogen.
C. There is one-half as much oxygen as hydrogen.
D. There is four times as much oxygen as hydrogen.
In an investigation of the decomposition of water, a student compared the amount of oxygen in one test tube to the amount of hydrogen in the other test tube is There is one - half as much as hydrogen.
In decomposition of water , water can be broken into the hydrogen gas and the oxygen gas. The water decomposition reaction is given as :
2H₂O ------> 2H₂ + O₂
The ratio of hydrogen and oxygen in the decomposition reaction of water is 2 : 1.
Thus, In an investigation of the decomposition of water, a student compared the amount of oxygen in one test tube to the amount of hydrogen in the other test tube is There is one - half as much as hydrogen.
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Which process uses the most water in the United States?
public use
irrigation
industry
power plants
The most water in the United States is used power plants (thermoelectric power)
What are thermoelectric power plants ?
Water flowing through the boiler's network of pipes is heated, turning it into steam. A shaft connecting a turbine to a generator rotates the blades of a turbine powered by high-pressure steam. As the generator turns, electricity is generated. The thermoelectric power of a given metal is that of a couple made of that metal with lead, with the thermoelectric power of lead being arbitrarily regarded as zero. Rate of change of the thermoelectromotive force of a thermocouple with temperature.
Industrial water withdrawals make up just 5% of all water withdrawals in the US, but thermoelectric power draws make up 49% of all withdrawals. About 12% of the public water supply is also used by industrial and manufacturing companies.
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10. In which of the following situations is a biotechnologist most likely to decide to use directed evolution as an enzyme engineering technique as opposed to rational design?
A) When a structure of the
enzyme is available to aid engineering
B) When the enzyme can only be
screened in a low throughput manner
C) When the enzyme mechanism
is understood and provides insight to engineering
D) When current data allows
molecular modelling techniques to be used predictively
E)When none of the above are true
A Biotechnologist decides to use directed evolution as an enzyme engineering technique when the enzyme mechanisms is understood and provides insight to engineering Why is directed evolution important?
A potent method for enhancing the functionality of proteins is directed evolution. When the biological function is unclear or there is little chemical understanding of the substrate and protein structure, directed evolution generates hundreds of variants in order to find the optimal solution.
What is enzyme engineering technique?
In order to increase the usefulness and activity of existing enzymes, enzyme engineering approaches use recombinant DNA technology to develop new proteins and enzymes with designer functions.
What is rational design?
In synthetic science and biomolecular designing, sane plan (RD) is an umbrella term which welcomes the system of making new particles with a specific usefulness, in light of the capacity to foresee how the atom's construction (explicitly got from themes) will influence its conduct through actual models.
Hence, Biotechnologist most likely to decide to use directed evolution as an enzyme engineering technique as opposed to rational design when the enzyme mechanism is understood and provides insight to engineering .
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What does atomic number describe?
Responses
mass
mass
number of protons
number of protons
number of neutrons
number of neutrons
atomic weight
Answer:
Number of protons in the nucleus of an atom
7. Help question is in picture below!
The equation of the reaction can be obtained as the net ionic equation of the reaction is; [tex]Fe^{2+} (aq) + CO_{3} ^{2-} (aq) ----- > Fe CO_{3} (s)[/tex]
What is the net ionic equation of the reaction?The term net ionic equation has to do with the fact that we have considered the is that did not participate in the reaction. These ions that did not change in the course of the reaction are called the spectator ions in the reaction.
As we look at the reaction, we can see that ions that did not change in the reaction are the chlorate ion and the sodium ion. Thus the net ionic equation can be written as; [tex]Fe^{2+} (aq) + CO_{3} ^{2-} (aq) ----- > Fe CO_{3} (s)[/tex].
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